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  <title>Applies a function on the image</title>

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 <div class="refnamediv">
  <h1 class="refname">Imagick::functionImage</h1>
  <p class="verinfo">(No version information available, might only be in Git)</p><p class="refpurpose"><span class="refname">Imagick::functionImage</span> &mdash; <span class="dc-title">Applies a function on the image</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-imagick.functionimage-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">bool</span> <span class="methodname"><strong>Imagick::functionImage</strong></span>
    ( <span class="methodparam"><span class="type">int</span> <code class="parameter">$function</code></span>
   , <span class="methodparam"><span class="type">array</span> <code class="parameter">$arguments</code></span>
   [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$channel</code><span class="initializer"> = Imagick::CHANNEL_DEFAULT</span></span>
  ] )</div>

  <p class="para rdfs-comment">
   Applies an arithmetic, relational, or logical expression to an image. 
   Use these operators to create lighter or darker versions of an image, to increase or decrease contrast in an image, 
   or to negate the image colors. 此方法在Imagick基于ImageMagick 6.4.9以上版本编译时可用。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-imagick.functionimage-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">function</code></em></dt>

     <dd>

      <p class="para">
       Refer to this list of <a href="imagick.constants.html#imagick.constants.function" class="link">function constants</a>
      </p>
     </dd>

    
    
     <dt>
<em><code class="parameter">arguments</code></em></dt>

     <dd>

      <p class="para">
       Array of arguments to pass to this function.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-imagick.functionimage-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code>TRUE</code></strong>。
  </p>
 </div>


 <div class="refsect1 errors" id="refsect1-imagick.functionimage-errors">
  <h3 class="title">错误／异常</h3>
  <p class="para">
   错误时抛出 ImagickException。
  </p>
 </div>

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